cross-country skiing

Short definition from Wiktionary

Noun

1. 1
   An endurance sport and method of getting about involving travelling on skis, uphill as well as downhill.
2. 2
   A leisure activity using cross-country skis and ski poles for traversing natural terrain during winter.
3. 3
   Alternative spelling of cross-country skiing.

Verb

1. 1
   present participle and gerund of cross-country ski